powerful drama, today, in the trial of olympic athlete Oscar Pistorius. For the first time, graphic photos of his girlfriend, killed by his gunfire. The superstar athlete, the model, once a glamorous couple, posing for the cameras. But today, the man called blade runner covered his eyes. ABC's Matt Gutman, back in the courtroom tonight. Reporter: The world sees for the first time, that bloody scene. Oscar Pistorius' blood-smeared prosthetic legs. Blood pooled on the bathroom floor. Last Valentine's day, Pistorius killed his lover, reeva steenkamp, claiming he thought it was an intruder. Now, he faces a different barrage of cameras. And today, during testimony, when steenkamp's bloody face flashed on the screen, he began heaving. It would only get worse. One of the first cops on the scene, then testified about what he saw that night. And that police taking us from the witness stand, out of the courtroom, and through this high-security wall, with electrified fences, right into Oscar Pistorius' house, with a trail of blood. Slides showing the bloody towel used to stop steenkamp's wounds. The air rifle. The stones in the bathroom and its shattered door. It was reinstructed in center court. Pistorius realized when he killed steenkamp, he put on prosthetics to bash down the door. The marks on the door is actually consistent with not having his legs on. Reporter: The prosecution accused him of lying about that night, suggesting steenkamp's death was anything but an accident. Matt Gutman, ABC news, Pretoria, South Africa.

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